Influence of anaerobic and anoxic hydraulic retention time on biological nutrient removal in a membrane bioreactor

Local Wastewater Treatment Plant for Dairy Production: Challenges and Solutions

“…Table 1. Wastewater characteristics from dairy production and household [11,[18][19][20][21][22][23][24][25]. [11,[18][19][20][21][22][23][24][25].…”

Impact of additional carbon on poly-hydroxybutyrates (PHB) accumulation and nutrient removal in a sustainable anaerobic/anoxic/oxic (A2O) membrane bioreactor

“…Hydraulic retention time (HRT), solids retention time (SRT), recirculation ratios and concentration of carbon have an impact on nitrogen and phosphorus removal. In an A 2 O membrane bioreactor, Brown (2007) found that phosphorus removal increased with an increase in SRT from 10 to 25 days and then declined when the SRT was greater than 50 days. Nitrification and denitrification performances were improved with an increase of SRT until 70 days, and phosphorus removal decreased at prolonged SRT due to a reduction in excess sludge (Sung-Soo et al, 2004).…”

“….1 PHB production under different SRT (adapted fromJohnson et al, 2010) ....................................................... Table 3.1 Membrane filter specification(Brown 2007) ......................................... Table 3.2 Synthetic wastewater composition (adapted from Brown et al, 2011) ........................................................ Table 3.3 Compositions of added carbon sources .................................................. Table 3.4 Summary of feeding conditions to anoxic or anaerobic tank ................. Table 3.5 Hach methods used ................................................................................. Table 3.6 Nutrient removal for various recirculation ratios and HRT conditions .. Table A.1 Influent characteristics ............................................................................... Table A.2 Anaerobic characteristics ........................................................................... Table A.3 Anoxic characteristics ................................................................................ Table A.4 Aerobic characteristics ............................................................................... Table B.1 Anaerobic, anoxic and oxic characteristics with acetate addition to anaerobic tank ......................................................................................... Table B.2 Anaerobic, anoxic and oxic characteristics with acetate addition to anoxic tank ............................................................................................. Table B.3 Anaerobic, anoxic and oxic characteristics with supernatant added to anaerobic tank ......................................................................................... Table B.4 Anaerobic, anoxic and oxic characteristics with supernatant added to anoxic tank ............................................................................................. Table B.5 Anaerobic, anoxic and oxic characteristics with thin corn stillage added to anaerobic tank .................................................................................... Table B.6 Anaerobic, anoxic and oxic characteristics with thin corn stillage added to anoxic tank ......................................................................................... ACKNOWLEDGEMENT I thank Dr. Say Kee Ong for holding weekly meetings to discuss my thesis process, challenging my thinking and improving my visions in research.…”